20196820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{557}}^1$

素因数の和:617

約数の個数: 72

約数和(自身を含む): 50762376

約数和(自身を除く): 30565556

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 49, 70, 74, 98, 140, 148, 185, 196, 245, 259, 370, 490, 518, 557, 740, 980, 1036, 1114, 1295, 1813, 2228, 2590, 2785, 3626, 3899, 5180, 5570, 7252, 7798, 9065, 11140, 15596, 18130, 19495, 20609, 27293, 36260, 38990, 41218, 54586, 77980, 82436, 103045, 109172, 136465, 144263, 206090, 272930, 288526, 412180, 545860, 577052, 721315, 1009841, 1442630, 2019682, 2885260, 4039364, 5049205, 10098410, 20196820]

約数ペア:

[(1, 20196820), (2, 10098410), (4, 5049205), (5, 4039364), (7, 2885260), (10, 2019682), (14, 1442630), (20, 1009841), (28, 721315), (35, 577052), (37, 545860), (49, 412180), (70, 288526), (74, 272930), (98, 206090), (140, 144263), (148, 136465), (185, 109172), (196, 103045), (245, 82436), (259, 77980), (370, 54586), (490, 41218), (518, 38990), (557, 36260), (740, 27293), (980, 20609), (1036, 19495), (1114, 18130), (1295, 15596), (1813, 11140), (2228, 9065), (2590, 7798), (2785, 7252), (3626, 5570), (3899, 5180)]